KVM: VMX: Wrap all accesses to IA32_DEBUGCTL with getter/setter APIs

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[ Upstream commit 7d0cce6cbe ]

Introduce vmx_guest_debugctl_{read,write}() to handle all accesses to
vmcs.GUEST_IA32_DEBUGCTL. This will allow stuffing FREEZE_IN_SMM into
GUEST_IA32_DEBUGCTL based on the host setting without bleeding the state
into the guest, and without needing to copy+paste the FREEZE_IN_SMM
logic into every patch that accesses GUEST_IA32_DEBUGCTL.

No functional change intended.

Cc: stable@vger.kernel.org
Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
[sean: massage changelog, make inline, use in all prepare_vmcs02() cases]
Reviewed-by: Dapeng Mi <dapeng1.mi@linux.intel.com>
Link: https://lore.kernel.org/r/20250610232010.162191-8-seanjc@google.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

This commit is contained in:

Maxim Levitsky 2025-08-14 17:12:04 -07:00 • committed by Greg Kroah-Hartman

parent df4071e609

commit ede3cd43f8

4 changed files with 24 additions and 12 deletions

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10

arch/x86/kvm/vmx/nested.c

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arch/x86/kvm/vmx/pmu_intel.c

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arch/x86/kvm/vmx/vmx.c

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arch/x86/kvm/vmx/vmx.h

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